$\"\"$

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The functions are $\"\"$ and $\"\"$ .

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$\"\"$

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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The function $\"\"$ .

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Substitute $\"\"$ .

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$\"\"$ .

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$\"\"$

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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The derivatives of $\"\"$ and $\"\"$ are equal.

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$\"\"$

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The derivatives of $\"\"$ and $\"\"$ are equal.